PQ of water treatment plant

Dear experts,
We have an URS of water treatment plant where we wrote the specifications of water according to USP. But in PQ we want to test PW & WFI according to BP spec. Thus BP spec. is more flexible than USP. Is it possible? Is it acceptable by auditor?

[quote=ronju17041]Dear experts,
We have an URS of water treatment plant where we wrote the specifications of water according to USP. But in PQ we want to test PW & WFI according to BP spec. Thus BP spec. is more flexible than USP. Is it possible? Is it acceptable by auditor?[/quote]
Where you want to sell your product?

Now for Europe, but US may be come afterwards